Feed-control mechanism



E. G. GARTIN FEED CONTROL MECHANISM Dec. 21 1926.

of Filed Jan. ,19, 1920 Patented Dec. 21, 192%.

pairs sraares eAirsNfri'esrifc sjff Era/ran e. GARTIN, OF'CLAREMON'T, new HArIPsnmnfAssrerion o sum er Mir-Q,

orrrnnav COMPANY, A CGRPORATIQN 'or' rrnssncnusnrrs.

FEED-CONTROL rrnonAnrsM.

Application filed January 19, race. Serial No.13 52540/ Renewed October 14.19am sensin 594,655.

My invention relates to feed control mechanism. V

its object is to provide an improved teed control mechanism, and more particularly an improved teed control mechanism adapt.-

ed to regulz'ite the rateot feed'ot what is known as astoping drill. A further ob ect of my invention is to provide an improved 'leetl controlling mechanism in which the parts are simple and of great strength.

In the accompanying drawings I have shown, for purposes or illustration, one town which my invention may assume in practice.

In these drawings, V

1 is a plan View of a stoper provided with a feed control mechanism embodying the illustrative term of my invention. 7

Fig. 2 is an enlarged view of the feed cylinder shown in'Fig. lwith certain parts shown on the section line 22, and other parts in elevation. I i

Figs. v3 and l a 'e, respectively, transverse sectionson lines and 44 of Fig. 2.

I have shown for purposes of illustration a stoper indicated generally by 1 in which a percussive motor 2 is adapted to actuate a drill steel 3 and to be fed toward or from the work by means of aifeed cylinder inclioated generally-by hthe operation of the motor and the supply of air to the feed cylinder being regulated in a well-known mannor by a throttle valve 5. The feed cylinder 4!: is secured, as shown in Fig. 2, to the rear end of, and coaxial with, the percussive mo tor 2. The feed cylinder comprises a cylin der member '6 in which there is reciprocably inountec a piston 7 provided with a piston rod 8 which has at its outer-end a point 9. adapted to engaqe a supporting; surface duringoperation ot' the tool.

its it is sometimes diiiicul't, for example, when starting a hole, to regulate the feed in the desired manner by means of the manual *alve 5 alone, I. have provided, to cooperate withth'e'cylinder 6 and piston rod 8, a feed controlling n'iechanism indicated generally l y-1lwl$gidly secured to the end of the piston rod 8 and adjacent the point 9, there. is arranged a cross arm'12 which receives atopposite ends a pair of side rods 13 which are'connected at their'opposite ends to a sli.d-. able member 14; surrounding the exterior oi the cylinder C. The engagement of the rods. 12- withthemembers and 1d maintains them in parallel relation to the feed cylinder;

Cooperating'with the rods ,:18 .andrfixedly securechnsby rivets '15, relative to the rear end of the feed cylinder is a clamping mech: anism generally indicated by 17. The clamping mechanism consists generally et two semicircular members '18,.and 19 pivotally connected at one end, as .at 20, by means of one of the siderods 13 and provided at their other-ends, i; e., at their free ends, with oppositely disposed sockets 21. These sockets conform in shape to the side rods-and are lined with suitable brake material ,22,as shown in Fig. A bolt 24 is arranged between the outer ends of theclamp members'lS and 19 and a nut 25. provided with. a handle 26 is arranged to cooperate with-the bolt 24 in theapplication and relcasingot the clamp. I have here shown the bolt :24 withletthand thread. j

i From the foregoing description the opera; 7 tion of my improved, mechanism will be] readily apparent Assumethe piston 7 to bein the position indicated in Figs. 1 and2 and that air is admitted to the forward end of the feed cylinder to cause the drill to feed toward the work; .Let it -;also be assumed that the handle 26 is given a right hand turn sufficient to releasethe frictional engagement of the clamp members lil -and 20 with the right hand side rod 13 in Fig. '3. The rate of feed will then be controlled only by the air suppliedunde'r control of the valve 5. ;.Sh0uld it be :d siredto retard the rate of feed orto stop the :t'eed entirely, all that is necessary is togivea lett hand rotation to the handle 26 which will cause the nut 25- to screw down upon the boltj24 and swing arm 19 of the clampabout the pivot '13 and cause the brake lining 22 to be tightly pressed upon the side rod13. aItvwill be obvious that the rate ofgteed may be varied as desired in accordance with, the degree of force exerted by thebolt 24 and nut 25 in pressing the brake lining against the side rod 13. It will be evident that I have pro vided a very simple retarding device with a minimum number of parts and one in which bending strains will be entirely eliminated. Itwill further be obvious that by the nature ot the pivotal connection 20 I; have caused the application of a braking force on both side rods, although this is not true in equal degree on'both sides. When the bolt 24- is placed under tension, the arm 1.) will tend to-pivot on the righthand side rod 13 and loo frictionally engage at its pivot point the left hand side rod 13. Suitable means, e. g., a fiat, prevents turning of the bolt 24;.

While I have in this application specifically described one form which my invention may assume in practice, it will be understood that this form of the same is shown for purposes of illustration and that the invention may be modified and embodied in other forms without departing from its spirit or the scope of the appended claims.

lVhat I claim as new and desire to secure by Letters Patent is:

1. In a feed controlling mechanism, a stationary member engageable with an extraneous abutment, a member movable relative thereto during feeding and by which the member to be fed is carried, normally immovable means secured to said stationary member and arranged parallel to said movable member, and controlling means carried by said movable member and frictionally engageable with said first mentioned means to control the rate of feed.

2. In a feed controlling mechanism, a stationary member engageable with an eX traneous abutment, a member movable relative thereto during feeding and by which the member to be fed is carried, a normally immovable member secured to said stationary member, and controlling means secured to said movable member and frictionally engageable with said third mentioned member to control the rate of feed.

3. In a feed controlling mechanism, a stationary member engageable with a mine surface, a movable member, a clamp secured to said movable member, a stationary bar engaged by said clamp and attached to said stationary member, and means for adjusting said clamp.

4. In a feed controlling mechanism, a stationary member provided with an abutment engaging point, a movable member coaxial therewith, a clamp secured to said movable member, a stationary side rod engaged by said clamp and attached to said stationary member, and means for adjusting said clamp.

5. In a feeding mechanism, a cylinder, a piston, a side rod connected to one of said members, and a clamp rigidly mounted with respect to the other of said members and adapted to frictionally engage said side rod.

6. In a feeding mechanism, a cylinder, a piston therein, a pair of side rods connected to one of said members, and a clamp stationary with respect to the other of said members and adapted to frictionally engage both of said side rods.

7. In a feed controlling mechanism, a stationary member, a cross member secured thereto, a movable member, a pair of side rods extending from said cross member parallel to the path of said movable member,

and a clamp fixed to said movable member cooperating with said side rods to frictionally engage one of them.

8. In a feed controlling mechanism, a stationary member, a cross member secured thereto, a movable member, a pair of side rods extending from said cross member par allel to the direction of motion of said morable member, and means cooperating with said side rods to frictionally engage both of them.

9. In a feed controlling mechanism, a stationary member, a pair of rods parallel to said stationary member and secured thereto, a movable member, a pair of clamp arms one of which is secured to said movable member and the other of which is friction ally engageable with one of said side rods.

10. In a feed controlling mechanism, a tionary member, a pair of rods parallel t said stationary member and secured thereto, a movable member, and a pair of clamp arms one of which is secured to said movable member and both of which are frictionally engageable with one of said side rods.

11. In a feed controlling mechanism, a pair of telescoping members, a pair of side rods secured in parallel relation therewith to one of said members and guided at their other ends by the other of said members, a clamping member surrounding one of said sidev rods and fixedly secured to said second mentioned telescoping member, a clamping member pivoted to said last mentioned side rod, and means to cause said clamping members to frictionally engage one of said side rods.

12. In a feed controlling mechanism, a pair of telescoping members, a pair of side rods secured in parallel relation to one of said members and guided at their other ends by the other of said members, a clamping member surrounding one of said side rods and fixedly secured to said second mentioned telescoping member, a clamping member pivoted to said last mentioned side rod, and means to cause said last mentioned clamping member to frictionally engage both of said side rods.

13. In a feed controlling mechanism, a pair of telescoping members, a pair of side rods secured in parallel relation to one of said members and guided at their other ends by the other of said members, a clamping member surrounding one of said side rods and fixedly secured to said second mentioned telescoping member, a clamping member pivoted to said last mentioned side rod, and means including a bolt connecting the free ends of said clamping members and a nut under manual control cooperating thercwith to cause said clamping members to frictionally engage said side rods.

14. In a feed controlling mechanism, a pair of relatively reciprocable feeding memhere one of which is engageable with a mine surface during feeding, means including side rods secured to one of said members and extending parallel to said line of reciprocation, and clamping means carried by the other of said members and adapted to engage said first mentioned means to control the rate of relative movement between said pair of members.

15. In a feed controlling mechanism, a pair of relatively reciprocable coaxial members one of which is engageable with a mine surface and the other of which is connected to a drilling tool, and means for regulating their relative movements during feedingineluding friction clamping means carried by one of said members, a member extending longitudinally of said members between which and the member which carries the friction clamping means relative movement occurs during feeding, and means whereby the application of pressure by said friction clamping/means tosaid third mentioned member retards the relative movement between saidpair of members.

-16. Ina feed controlling mechanism for, drilling tools, a pair of relatively reciprocable coaxial members one of which is connected. to. a. drilling tool and the other of which constitutes a fixed member engageable with a mine surface relative to which the first mentioned member and the tool move on feeding, a member extending longitudinally of said members between which and said first mentioned member relative movement occurs during'feeding, and friction means secured to said first mentioned member and operative when applied and released to vary the force necessary to cause movement between said third mentioned member and said first mentioned member whereby relative movement between said first and second mentioned members may be controlled.

17 In a feed controlling mechanism, a pair of relatively reciprocable coaxial members one of which is provided with an abutment engaging point, means comprising side rods attached to one of said members and extending parallel to the said line of reciprocation, and clamping means carried by and movable with the other of said members and adapted to engage said side rods to retard relative movement between said pair of members. a

18. In a feed controlling mechanism, a feeding device including a pair of relatively reciprocable coaxial members one of which is provided with an abutment engaging point, and means for regulating their relative movements during feeding including friction clamping means carried by one'of said members, a meinberbetween which and one of said pair of members positive relative movement occurs during feeding, and means whereby'the application of pressure by said friction-clamping means tosaid tlnrd'mentioned member retards relative movement. 7 between said pair if members.

$19.. In a feed controlling mechanism for drilling tools, a pair of relatively reciprocable coaxial members one of which is con nected to a drilling tool andthe other of which constitutes a fixed vmember provided withwan abutment engaging point relative to which the firstunember and the tool move on feeding, "a member adapted to be move able with respect to said first mentioned ciprocably mounted therein; and adaptedto J engage a stationary abutment during feed ing, andcontrolling means thereforincludinga friction clamping-means carried ;by said cylinder, amember between which and one of said elements relative movement occurs on relative reciprocation between said cylinder and piston elements, and means for causing said friction clamping means to frictionally engage said member whereby the rate of such relative reciprocation between said elements is controlled.

21. In a rock drillingmechanism, a drilling motor, feeding mechanism therefor comprising a feed cylinder element secured to said motor in alinement therewith, a normally stationary feed piston element reciprocably mounted therein provided with an abutment engaging point, and controlling means therefor including a friction clamping means carried by said cylinder element, a member between which and one of said pair of elements relative movement occurs onrelative reciprocation between said elements, and means'for causing said friction clamping means to govern the relative movement between said member and one of said elements whereby the rate of such relative reciprocation between said elements is controlled.

22. The combination with a pneumatic tool and pneumatic feeding means therefor comprising a cylinder and a piston rod, of feed varying means comprising a rod attached to said piston rod and means frictionally engaging said rod and secured to said cylinder. 7 V

In combination with a pneumatic tool and pneumatic feeding means therefor comprising a relatively movable feed cylinder and piston rod, a crosshead secured to said piston rod, a member having sliding con nection with said cylinder, rods connecting said crosshead and said member, and means carried by said. cylinder and cooperating with said rods for controlling the movement between said cylinder and piston rod.

The combination with apneumatic tool and pneumatic feeding means therefor comprising a relatively movable cylinder and a piston rod, of feed varying means including parallel rods secured to said piston rod, a member having sliding connection with said cylinder and attached to said rods, and means carried by said cylinder for controlling the relative movement therebetween.

25. In a feed controlling mechanism, a pair of relatively movable elements, a pair of rods carried by one of said elements, a

clamp pivotally connected to one of said rods and frictionally engageable with the other, and means to adjust said clamp to control the movement of said movable member.

26. In a feed controlling mechanism, eoncentric stationary and movable elements the former being disposed within the latter, a crosshead secured to said inner stationary element, a member having sliding connection with said outer movable element, parallel rods connecting said erosshead and said last mentioned member, means carried by said movable element and including an element pivotally mounted on one oif said rods and frictionally engageable with another, and means to adjust said friction means.

27. In a feed controlling mechanism, a feeding cylinder, a stationary feed piston rod disposed coaxially therein, acrosshead secured to said piston rod, a member surrounding said cylinder and having sliding connection. therewith, rods connecting said erosshead and said member, means secured to said cylinder and including an element pivotally mounted on one of said rods and trictionally engageable with another, and means to adjust said friction means.

28. In. a feed controlling mechanism, a pair of relatively reciprocable feeding members, a third member secured to one of said members and between which and one of said feeding members relative movement occurs during feeding, and a friction device secured to one of said feeding members and frictionally engageable with said third member to govern the rate of feed.

In testimony whereof I atlix my signature.

ELMER G. GARTIN. 

